Causes of urban sprawl in the United States: auto reliance as compared to natural evolution, flight from blight, and local revenue reliance

A regression analysis shows that a ten percent reduction in households owning automobiles would reduce the square mile of an urban area by only 0.5 percent and its population density by 0.7 percent. It is also found that a ten percent reduction of per capita income would reduce the urban area by 11.4 percent and raise the population density by 10.1 percent.